Sequential delivery device and method
A reagent delivery method includes placing a reagent delivery column including a plurality of reagent storage elements therein in a centrifugal device, coupling a breaching element to the housing, and rotating the centrifugal device to force the reagent storage elements toward the breaching element, breaching of the reagent storage elements releasing reagent therein and communicating the same to an external environment. A reagent delivery system includes a column having a housing, a plurality of reagent storage element sheets positioned in the housing or forming a stack, a plurality of breaching elements, and a microplate having a plurality of wells, the microplate coupled to the housing where each well corresponds or aligns with a breaching element and a reagent storage element. The system can be rotated in a centrifugal device to force the reagent storage element stacks toward the breaching elements.
Technical Field
The present disclosure relates to the field of reagent delivery, and more particularly, to devices and methods delivering reagents in an automated and sequential manner.
Description of the Related Art
Various chemical, biological, or other applications can benefit from automated fluidic or reagent delivery. Examples include, and are not limited to RNA, DNA, protein extraction and purification from biological samples, hybridization of nucleic acid to microarrays, immunological assays, protein and western blots processing, or more generally separation of a chemical which requires incubation of a set of known reagent with separation media.
These processes are typically performed in well-equipped laboratories. They generally involve delivery of various reagents onto a target chamber which often times is the core or contains the active component for that process. For example, extraction of nucleic acid includes using an active component, which is the matrix inside a “spin column.” In microarray based hybridization the active component is an array of capture probes. These reagents can play many roles such as buffering or changing the PH of the core chamber contents or changing its salt concentration. In addition, or instead, they can act as washes, or be the solution in which the target of interest is dissolved. It is desirable these reagents be prepared, procured, mixed, and/or stored in sanitary environments and conditions, and delivered in accurate amounts to the process core in a predefined sequence and/or timing.
One such process example, SPE or solid phase extraction, is a separation process by which compounds, dissolved or suspended in fluid mixture, are separated from other compounds in the mixture according to their physical and chemical properties. Analytical laboratories use solid phase extraction to concentrate and/or purify samples for analysis.
For example, solid phase extraction can be used to isolate analytes of interest from a wide variety of sources, including, but not limited to, urine, blood, water, beverages, soil, and animal tissue. SPE uses the affinity of solutes dissolved or suspended in a liquid (known as the mobile phase) for a solid through which the sample is passed (known as the stationary phase) to separate a mixture into desired and undesired components. The result is that either the desired analytes of interest or undesired impurities in the sample are retained on the stationary phase. The portion that passes through the stationary phase is collected, transferred, or discarded, depending on whether it contains the desired analytes or undesired impurities. If the portion retained on the stationary phase includes the desired analytes, they can then be removed from the stationary phase for collection in an additional step, in which the stationary phase is rinsed with an appropriate eluent.
Existing devices and methods used to facilitate reagent delivery for various steps of aforementioned or other existing processes are generally time consuming, inefficient, and prone to operator error and environmental contaminants, and have cost drawbacks. For example, the classic manual pipetting of reagents is time-consuming, resource dependent, and expensive. Manual pipetting requires multiple manually performed steps of dispensing solutions such as suspensions and washing buffers, consuming scientist labor and requiring numerous tools and consumables such as multiple pipettes, pipette tips and vials. Other manually operated devices that attempt to improve on manual pipetting, continue to consume scientist labor and time, and are limited in application.
Two significant drawbacks of manual operation is operator error and environmental contaminants. Automatic pipetting similarly requires exceedingly expensive equipment. Certain existing automated or semi-automated devices are either intended for solely microfluidic applications or are otherwise extremely complicated and expensive to manufacture, purchase, and operate. Some automated devices require complicated internal mechanisms and/or requirements, which make it extremely difficult to load reagents.
An additional drawback of some existing devices includes the lack of capability to assemble, organize, or arrange reagents separate from the devices, and requiring the devices to serve as the reagent container.
By way of a particular example, the following is an existing RNA extraction procedure based on existing Qiagen™ RNeasy Mini spin columns™.
The RNeasy™ kit provides protocols and reagents for purification of total RNA from animal cells, animal tissues, plant cells and tissues, filamentous fungi and yeast, and for cleanup of RNA from crude RNA preps and enzymatic reactions (e.g., DNase digestion, proteinase digestion, RNA ligation, and labeling reaction).
The RNeasy™ Mini Kit can also be used to purify total RNA from bacteria. The purified RNA is suitable for downstream applications such as:
-
- RT-PCR and real-time RT-PCR
- Differential display
- cDNA synthesis
- Northern, southern, and western, dot, and slot blot analyses
- Primer extension
- Poly A+RNA selection
- RNase/S1 nuclease protection
- Microarrays.
Summarized protocol:
1) Sample preparation:
Disrupt the sample according to the appropriate protocol in order to release RNA into solution. Most often, the solution is RLT lysis buffer. Add one volume of 70% ethanol to the lysis buffer and mix.
22) Binding.
Add up to 700 μl of solution (RLT+EtOH+sample) to the Qiagen™ spin column, close the lid, and centrifuge at ≥8000 rcf for 15 seconds.
3) Washes:
Remove the column from the collection tube, empty the flow-through, and return the column back to the collection tube. Add 700 μl RW1 wash buffer to the column, close the lid, and centrifuge at ≥8000 rcf for 15 seconds. Remove the column from the collection tube, empty the flow-through, and return the column back to the collection tube. Add 500 μl RPE (1:4 RPE concentrate to 100% EtOH, premixed) to the column, close the lid, centrifuge at ≥8000 rcf for 15 seconds. Remove the column from the collection tube, empty the flow-through, and return the column back to the collection tube. Repeat the RPE wash two more times. Dry the column by removing the column from the collection tube, wiping residual solution off of the column, putting the column into a clean collection tube, and centrifuging at ≥8000 rcf for 1 minute.
4) Elution:
Place the column into a new collection tube, add 30-50 μl of elution water, close the lid, and centrifuge at ≥8000 rcf for 15 seconds. The eluent will contain the RNA and is ready for downstream applications.
As demonstrated above, this is one example, which requires multiple steps, demanding scientist time and expensive components.
BRIEF SUMMARYA reagent delivery method using at least one reagent storage element configured to store reagent, includes movably positioning the at least one reagent storage element in a delivery column having a housing including a housing volume, coupling a breaching element to the housing toward one end of the housing volume, positioning the reagent delivery column in a centrifugal device, rotating the centrifugal device to produce centrifugal forces moving the at least one reagent element toward the breaching element, breaching the reagent storage element upon contact thereof with the breaching element to release reagent stored therein, and communicating reagent from at least one of the housing volume and the reagent storage element, to an external volume located externally with respect to the housing volume.
In one aspect, the movably positioning step includes positioning a seal portion of the reagent storage element to extend laterally beyond a width of a body portion thereof, the seal portion contacting the housing, and the body portion being spaced from the housing.
In one aspect, the breaching of the reagent storage element occurs in the reagent delivery column housing.
According to another embodiment, a method of using a centrifugal device, includes positioning a column having a housing in the centrifugal device, positioning at least one reagent storage element in the housing of the column, coupling a breaching element to the housing toward one end thereof, and rotating the centrifugal device, rotation of the centrifugal device moving the reagent storage element toward the breaching element, the breaching element breaching the reagent storage element, releasing reagent stored therein and communicating the reagent to an external environment located externally with respect to the housing.
According to yet another embodiment, a reagent delivery system includes a reagent delivery column having a housing, the housing including a housing volume, at least one reagent storage element sheet including a plurality of reagent storage elements configured to store reagent and movably positioned in the housing volume, a microplate having a plurality of wells, the microplate coupled to the reagent delivery column housing, a plurality of breaching elements coupled to at least one of the housing and the microplate, each breaching element configured to breach a respective reagent storage element in the reagent storage element sheet, at least one of the breaching element and the housing configured to communicate reagent from at least one of the housing volume and the reagent storage element, to a corresponding well in the microplate, and a centrifugal device configured to rotate, the reagent delivery column selectively positionable in the centrifugal device, rotation of the centrifugal device producing centrifugal forces moving the at least one reagent element toward the breaching element when in operation.
According to one aspect, the reagent storage element sheet includes outer reagent storage elements each having a body portion having a width and a height, the reagent storage element sheet including a seal portion, the seal portion extending laterally beyond the width of the body portion of the outer reagent storage elements, the seal portion contacting the housing, the body portions being spaced from the housing.
In one embodiment, the reagent delivery device 100 includes a reagent delivery column 101 configured to be directly or indirectly coupled to a target chamber 116. In one embodiment, the target chamber 116 can be selectively and removably coupled to the reagent delivery column 101.
In one aspect, illustrated in
In an aspect, the reagent delivery column 101 includes a housing 112 configured to receive the reagent storage element(s) 104. In one embodiment, the reagent storage elements 104 can each include a pouch, blister, or other containing unit housing a reagent, for example a cylindrical pouch. In some aspects, each reagent storage element 104 can include a flexible pouch, which can be fabricated from any suitable material such as flexible plastic or polymeric material. In some embodiments, the reagent storage elements 104 can be prefilled with reagent fluids.
In one embodiment, as illustrated in
In one aspect, the reagent storage elements 104 can be permanently or removably coupled to one another. For example, the storage element stack 105 can include respective coupling members 103 positioned between respective reagent storage elements 104, coupling adjacent reagent storage elements 104. In some embodiments, the coupling members 103 can include an adhesive element, such as for example, a double-sided adhesive element. The coupling members 103 can assist maintaining the reagent storage elements 104 aligned. In some aspects, the coupling member 103 can include a void or hole toward a region where the breaching element 114 passes to avoid contact with, and/or contamination of, the breaching element 114.
As shown in
The target chamber 116 can include a column having an active element, core, and/or matrix 119, or it can include additional fluid transfer components such as distribution manifolds facilitating fluid transfer to or from the active element, core, matrix 119, or around it to a different volume in the target chamber 116. Examples of these embodiments are later described for a thorough understanding of the present disclosure without any intention to limit the scope thereof. The active element, core, matrix, and/or column can include or be made from fiberglass, sand, composites, gel, any combination thereof, and/or any other suitable material.
For clarity of description and without any intention to limit the scope of the present disclosure, some of the example embodiments that follow relate to embodiments including more than one reagent storage element 104 and where the egress structure 102 includes the breaching device 114, which is hollow. For further clarity and without any intention to limit the scope of the present disclosure the breaching device will be referred to as needle 114. It is understood and appreciated that other breaching device embodiments are contemplated to fall within the scope of the present disclosure and some non-limiting alternate embodiments thereof are described later in this disclosure.
The needle 114 in some embodiments can contain a restrictive element to control the flow of reagent or its diameter can act as such. For example, the needle 114 can include or be coupled to a nozzle acting in conjunction with the centripetal forces to achieve a desired fluid flow rate.
In one aspect, the reagent storage elements 104 can include within their respective volumes the same or distinct reagents, fluids, which may include liquid(s) and/or gas(s), suspensions, or any a combination of fluids and gases and/or any other suitable contents that may be desirable for sequential delivery to the target chamber 116. For clarity of description and without any intention to limit the scope of the present disclosure or content of the storage element, its content will be referred to as reagent.
In one embodiment, as the centrifugal device 110 operates to rotate at a threshold revolutions per minute and/or faster, movable elements in the housing 112, such as the reagent storage element(s) 104, experience a force toward the egress structure 102. For example in some aspects the movable elements in the housing 112 can experience a generally downward force in embodiments in which the reagent delivery apparatus 100 is positioned with the egress structure 102 below the movable elements.
It is understood the present disclosure contemplates within its scope other embodiments in which other mounting or positioning of a reagent delivery apparatus or portions thereof, whereby the reagent storage elements 104 may move in a direction different from, or in addition to, the downward direction in response to centripetal forces imposed by the centrifugal device 110. For example, the column 101 may be positioned with a longitudinal axis thereof at an angle with respect to a vertical axis of the centrifugal device 110.
Embodiments of the present disclosure can be configured for use with existing centrifugal devices without the need to develop custom or specialized centrifugal devices.
Furthermore, the Figures may illustrate the reagent delivery column 101 with its longitudinal axis appearing as horizontal or vertical with respect to the actuating source vertical axis for clarity of illustration; however it is understood that in various embodiments, the longitudinal axis of the reagent delivery column may be at any suitable angle with respect to the actuating source vertical axis, including an angle that is different from 90 degrees or 180 degrees, or one that is between 0 and 90 degrees.
As illustrated in
In some embodiments, the spacer elements 107 can function to also couple the reagent storage elements 104, and serve as the coupling member 103 described above. For example, the spacer elements 107 can respectively include adhesive on opposing sides thereof which are positioned contiguous adjacent reagent storage elements 104, respectively.
In some embodiments the reagent delivery column 101 or device 100 may include a spring, foam, rubber, or other protection or biasing device 109 configured to protect the reagent storage elements 104 during transport or shipping, and facilitating a more controlled reagent delivery process during operation.
In some embodiments, the reagent delivery device 100 can include additional biasing features, such as a counter-weight element 111 positioned above or adjacent the reagent storage element 104 farthest from, or distally positioned with respect to, the breaching element 114, contributing to alignment and forcing of the reagent storage elements 104 toward the breaching element 114. Some embodiments may exclude such a biasing device. The foregoing biasing features are explained in more detail below for an example embodiment with respect to operation of an apparatus according to one aspect.
In various embodiments, the target chamber 116 can include any suitable target receiving area based on user preference and intended application. For example,
In one aspect, the transfer channel 115b is configured to be movable between a first position in which the transfer channel 115b communicates fluid from the binding matrix 119b to the collection volume 117b (
The reagent delivery column 101 (
In the discussion that follows, the general operation of the reagent delivery column 101 according to one embodiment is described with respect to an embodiment in which the reagent delivery column 101 is coupled to the target chamber 116 as illustrated in
The illustrated embodiment of
The biasing device 109 and counterweight 111 can include attributes that bring about desired motion characteristics for movement of the reagent storage elements 104 toward the breaching element 114. Referring to
It is appreciated that the reagent storage elements 104 in some embodiments can move in response to centrifugal or other actuation forces, toward the needle 114 without a counterweight. This is because the reagent storage elements 104 containing reagent have a mass and centrifugal forces act on that mass biasing it to move.
In embodiments that include the counterweight 111, the counterweight 111 having a mass of its own and being positioned on a side of the storage element stack 105, advantageously assists in forcing the reagent storage elements 104 toward the needle 114. The counterweight can be designed or sized to have a particular mass. This mass along with selectively managing the forces acting the counterweight 111, for example via the centrifugal device 110, allows customizing movement characteristics of the reagent storage elements 104.
Furthermore, the spring 109 can include resistive and/or resilience characteristics and/or spring constant (or equivalent for other biasing elements) to assist in managing and customizing the movement characteristics of the reagent storage elements 104 so that they are need moving with a force and a speed beyond a threshold force and speed, respectively.
The counterweight 111 and spring 109 can respectively include weight and resistance attributes, which in combination, and when exposed to an actuation source, such as the centrifugal force of the centrifugal device 110, can bring about desired motion characteristics of the reagent storage elements 104. The lower and closer to the needle 114 a reagent storage element 104 is it experiences more force given it bears a larger mass above it. With these dynamic concepts in mind, the weight of the counterweight 111, the resistive force of the spring 109, and the speed or force of the actuation source, can be customized to achieve particular reagent storage element 104 movement speed toward the needle 114 as well as the duration of time elapsing between the times multiple storage elements 104 reach the needle 114.
In one embodiment, as illustrated in
In one embodiment, the apparatus 100 can include a platform 113 positioned between the counterweight 111 and the reagent storage element 104 farthest from the breaching element 114. The platform 113 can serve to transfer a force exerted by the counterweight 111 in a more evenly distributed manner, forcing the storage element stack 105 uniformly, and mitigate any damage to the reagent storage element 104. In some embodiments, the platform 113 can also serve to protect the needle 114 by preventing it from contacting the counterweight.
In one aspect, the needle 114 communicates the reagents in the reagent storage elements 104 between the respective storage elements 104 and the target chamber 116. The following non-limiting example is provided for an understanding of an example application, without any intention to limit the scope hereof to any particular application.
For example, in RNA or DNA extraction context, a suspension containing the RNA or DNA or generally nucleic acid is initially prepared and contained in an extraction column having a matrix, such as the matrix 119, and then transferred to the target chamber 116. This suspension may contain certain impurities and/or contaminants, for being processed to separate the RNA, DNA, or generally nucleic acid from the impurities.
For example, the storage element stack 105 of reagent storage elements 104 can include the same or distinct washing buffers such as 80% isopropanol, 75% ethanol, 10 mM Tris-HCl pH 7.5, 80% ethanol and/or any combination thereof or other suitable reagents, adapted or configured to remove at least some of the impurities and pass them through the matrix 119 to the collection volume 117, leaving the desired analyte bound to the binding matrix 119.
In some aspects, each reagent can perform a particular operation to the matrix 119. For example, a storage element stack 105 containing three reagent storage elements 104 could be assembled. Reagent storage element 104 proximal to the needle 114 could in some embodiments contain a Tris buffer, which when communicated to the matrix 119, it sets the PH of the matrix 119 to selectively bind RNA or DNA, while another reagent storage element 104 can contain alcohol washes to remove lipids and proteins. A third reagent storage element 104 can include a mixture of 75% ethanol and air to further wash the matrix and dry it respectively. Other suitable combinations are contemplated to be within the scope of the present disclosure, depending on the desired application and/or outcome.
Therefore, multiple and sequential suspension, solution, reagent, and/or other fluid delivery is made more efficient, expedient, and sanitary, and less labor intensive with embodiments herein by replacing manual and distinct steps with automated and less costly components, which automatically function to sequentially deliver reagents.
The speed, timing, and quantity of reagent delivery in various embodiments can be managed through controlling factors such as counterweight and biasing device design, reagent storage element volumes, centrifugal device speed and time, and introducing inert reagent storage elements such as those filled with air, between the reagent storage elements containing active reagents.
In embodiments that include the spring 109 and counterweight 111, these biasing features can counteract to aid and/or moderate in the overall force the reagent storage stack 105 experiences.
In some embodiments, a rotational velocity of the centrifugal device 110 (
For example, the spring 109 can include resistance attributes such that the more the spring 109 is compressed the higher the force required to overcome its resistance. Therefore, user-selected or automated or programmed parameters as they pertain to at least one or more of centrifugal speed, counterweight 111, spring 109, and storage element 104 attributes, can be devised to control the speed and manner in which the reagent storage elements 104 approach the needle 114.
To reiterate, one of ordinary skill would appreciate the biasing device 109, referred to as a spring above for clarity of description, can in various embodiments include any suitable biasing member or material having resistance and/or resilience qualities. For example, the biasing device 109 can include at least one of a rubber, foam, spring, dampener or shock, washer spring, coil, any combination thereof, or any other suitable material, structure, and/or resistance or resilient member.
In applications where exceedingly long durations between reagent delivery are desired, an embodiment may use a centrifugal device adapted or configured to utilize a computer readable protocol to cease and restart centrifugal device operation or set the rotation speed of the centrifugal device 110 to separate the reagent storage element movement toward the needle 114 at the desired pace.
Embodiments that accommodate or include more than one reagent storage element 104 can be advantageous for sequential reagent delivery applications such as, but not limited to, Nucleic Acid extraction as described above with respect to one aspect, and/or other chemical reactions, such as protein purification, microarray hybridization, western, northern, southern blots, purifying reagents for PCR, extracting nucleic acid from gels, and/or performing buffer exchanges among others.
The reagent storage elements 104 may respectively store the same or different reagents. They can store the same reagents where it is desired for the same reagent to be delivered at intervals in the same or different quantities. In some embodiments the reagent storage element 104 volumes may vary or be the same. In some embodiments the reagent storage element(s) may respectively contain reagents which are separated by phase, via other storage element(s) containing inert or separating fluid, such as a buffer and/or air.
In some embodiments, the centripetal force can be selectively and/or automatically adjustable to control the pace at which reagents are delivered to the desired destination. For example, these parameters can be adjusted to suit protocols for certain applications such as extraction of nucleic acid, or protein using spin columns, purifying reagents for, performing buffer exchanges, or other chemical reactions.
These protocols may call for multiple reagents being added to one another or to a mixture of reagents at particular intervals and amounts. For example, in some embodiments, each reagent storage element 104 can have a particular volume. The reagent storage elements 104 can have the same or different volumes, allowing easy and expedient reagent delivery setup.
In the illustrated embodiment of
In the analyte extraction context, upon completing the wash or washes, the analyte of interest such as purified nucleic acid can be eluted from the matrix housed inside the target chamber using appropriate buffer or reagents. An eluent delivery column can be a device with the appropriate reagents and a collection tube, which can be free of degrading contaminant such as nucleic acid digestive enzyme. For example, in one embodiment an eluent delivery column can be utilized incorporating eluent storage elements similar to the reagent storage elements described above, sequentially delivering eluents to perform elution of the collected analyte. In such an embodiment, the user will replace the reagent delivery column and the target chamber with the eluent delivery column and a clean target chamber, respectively, to perform the elution.
Similar to the wash process, embodiments herein can save time and money for performing the elution in an automated and sanitary fashion.
In the illustrated embodiment of
The transfer channel 115b and/or the receptacle 118b can be rotatably or otherwise movably positioned in any suitable manner.
For example, the transfer channel 115b can be fixedly coupled to the matrix 119b, which in turn is fixedly coupled to the needle 114 or other portion of the housing 112 where rotation of the housing 112 rotates the matrix 119b and the transfer channel 115b. Alternatively, the receptacle 118b can be fixedly coupled to the target chamber 116b and rotation of the target chamber 116b rotates the receptacle 118b to position it to receive reagents from the transfer channel 115b. Other configurations are contemplated to be within the scope of the present disclosure.
Rotation of the reagent delivery column 101 and/or the target chamber 116b can be facilitated in any suitable manner. For example, the reagent delivery column 101 and/or target chamber 116b can be positioned in a receiving structure, such as a fork, receptacle, or other structure that is rotatable. In embodiments in which the actuation source 106 includes a centrifugal device, the portion of the centrifugal device receiving the reagent delivery column 101 and/or the target chamber 116b can be configured to rotate or otherwise move to alternate positioning of the transfer channel 115b outlet to fluidly communicate with the collection volume 117b and the receptacle 118b, respectively.
The rotation or movement of the transfer channel 115b can be automatic or manual. In embodiments in which the rotation is manual, the reagent delivery device 100 may include a lever or other manual actuation device to rotate the desired one of the reagent delivery column 101 or the target chamber 116b at a desired time during a reagent delivery process. In addition, or instead, the rotation actuation can be automatic and selectively programmable to initiate rotation of the transfer channel 115b at a particular time during a reagent delivery process.
For example, such embodiments will benefit from efficiency, speed, and reduced labor in contexts in which a first number of reagents are desired to be delivered to the matrix 119b then transferred to the collection volume 117b and a second number of reagents are desired to be delivered to the matrix 119b then delivered to the receptacle 118b. For example, in the nucleic acid, RNA, or DNA extraction context, the user will save time by not having to remove the reagent delivery column and replace the target chamber between the wash and elution phases.
Referring to
For example, in one aspect, the reagent storage elements 104 can include a seal portion 142 and a body portion 144 having a lip or rim 146, the seal portion 142 positioned adjacent, and being coupled to, the lip 146. The overlapping portion of the seal portion 142 and lip 146 can be coupled in any suitable manner, such as heated pressed, ultrasonic welding, sewed, adhered using liquid proof adhesives, any combination thereof, and/or any other suitable coupling method.
In one aspect, as illustrated in
In another embodiment, as illustrated in
Furthermore, various features of embodiments of the present disclosure can be multiplied or combined in various manners to accommodate various reagent delivery and mixing features. For example,
In such an embodiment, or various aspects thereof, the reagent storage elements 304 can be arranged identically or similarly in the respective columns 301, or alternatively, they can be arranged in a staggered or other desirable arrangement, to accommodate the proper simultaneous reagent delivery attributes suitable for the particular chemical or biochemical or other reaction or delivery as described herein or otherwise desired for a particular result.
For clarity of illustration, and without any intention to limit the scope of the present disclosure, a centrifugal device or other actuation source is not shown in
The centrifugal device in an embodiment such as that illustrated in
In some embodiments, the force acting on reagent storage elements can originate from other or additional suitable sources. For example,
Instead of, or in addition to, the centrifugal device or other actuation source discussed herein, the apparatus 400 may include a vacuum device 450 coupled to the housing 403 and configured to induce a vacuum within the volume of housing 403 to affect a pull force on the reagent storage elements 404 toward the needle 414. In some embodiments, the vacuum device can be coupled to the target chamber.
As a further example,
Instead of, or in addition to, the actuation sources discussed herein, the apparatus 500A, 500B may include a thrust or push device which can bias the reagent storage elements 504 toward the needle 514, either via a physical structure such as a linear actuator, for example a plunger 505, as shown in
As yet a further example,
Instead of, or in addition to, the actuation sources discussed above, the apparatus 600 may include one or more mechanical feature to exert force on the reagent storage elements 604 toward the needle 614. For example, in one aspect, the apparatus 600 may include a forcing member 608 threadedly coupled with respect to the housing 603, for example, with respect to an inner wall or surface of the housing 603. The forcing member 608 can be threadedly coupled to the housing 603 via any suitable method, such as complementary threads 656 on the forcing member 608 and the housing 603, respectively, or a lead screw or ball screw mechanism 658.
For clarity of illustration the threads 656 are shown as wrapping partially around the forcing member 608; however, it is understood, the threads 656 can in some embodiments wrap wholly around the forcing member 608, and that the lead screw or ball screw mechanism can include a shaft 660 extending into the forcing member 608 and being movably coupled thereto via complementary threads and balls that travel within those threads in a lead or ball screw arrangement. In such an embodiment, the shaft 660 or the forcing member 608 can be rotated via manual or automatic rotation devices to move the forcing member 608, which in turn contacts and moves the reagent storage elements 604 toward the needle 614.
In some embodiments, the forcing member 608 can be coupled to the housing 603 via a lead or ball screw mechanism where the forcing member 608 itself acts as the lead or ball screw shaft. In such an embodiment or in and embodiment where the forcing member 608 is threadedly coupled to the housing 603, the housing 603 can be rotated about a longitudinal axis 662 thereof, thereby the forcing member 608 translating with respect to the housing to force the reagent storage elements 604 toward the needle 614. In addition, or instead, the shaft 660 shown can be fixedly coupled to the forcing member 608 and coupled to a rotation device to rotate the forcing member 608 with respect to the housing 603 to impart movement on the forcing member 608.
Earlier it was discussed that managing time intervals between respective reagent delivery can be managed manually and/or automatically by controlling actuating source and/or introducing features between reagent storage elements; other modes of managing such intervals are contemplated to be within the scope of the present disclosure. For example, some embodiments may include movement control mechanisms in a reagent delivery column, which manage reagent delivery timing.
For example,
In one aspect, the reagent delivery apparatus 700 includes at least one delivery control mechanism 730 configured or operable to selectively or automatically facilitate or prevent movement of select reagent storage elements 704 toward the needle 714. For example, in one aspect the control mechanism 730 can include a keyed element including a key feature 732, such as a receptacle, recess, depression, notch, or the like. In such aspect, the housing 703 can include a complementary key feature 734, such as a protrusion, lip, rim, ledge, or the like. The control mechanism 730 can be positioned between reagent storage elements 704 between which the delivery time interval is desired to be controlled.
For example, in the illustrated embodiment of
Therefore, the first two storage elements 720, 722 can move and contact the needle 714 in response to an actuation source operating, while the control mechanism 730 prevents third storage element 724 from contacting the needle 714 based on the key features 732, 734 being misaligned.
In such an aspect, rotation of the control mechanism 730 to align the key features 732, 734 will facilitate movement of the control mechanism 730 and the third storage element 724. Such rotation can occur at a desired third reagent delivery time, for example manually via rotating the housing 703 or automatically via a rotation mechanism operatively coupled to the housing 703, which rotates the housing at a particular time.
Other breaching element and/or housing configurations are contemplated to be within the scope of the present disclosure, and can be used with any of the embodiments.
For example, as illustrated in
The housing 812 including a portion thereof forming the first end 860 can be formed from a unitary body of material in some embodiments. In some embodiments, the housing 812 can be coupled to a plug member 865 in which opening 862 is formed, configured to secure the breaching element 814.
In another embodiment illustrated in
The first end 960 of the housing 912 can include one or more peripheral openings or orifices 962 adjacent or contiguous the breaching element 914, or spaced therefrom. In such an embodiment, when the breaching element 914 pierces or breaches the reagent storage element 904, fluid or reagent 964, can pass around the breaching element 914 through the peripheral openings or orifices 962 toward the target chamber 916 or matrix 919.
The housing 912 including a portion thereof forming the first end 960 can be formed from a unitary body of material in some embodiments. In other embodiments, the housing 912 can be coupled to a plug member 965 in which an opening is formed, configured to secure the breaching element 914. In some aspects, the openings or orifices 962 are also formed in the plug member 965.
These peripheral openings 962, in addition to allowing fluid through toward the target chamber 916, also allow air to be communicated between the housing 912 and target chamber 916, for example into and/or out of the housing 912, mitigating or preventing vacuum formation in the housing 912 and facilitating better fluid transfer toward the target chamber 916.
In another embodiment illustrated in
In such an embodiment, when the breaching element 1014 pierces or breaches the reagent storage element 1004, released fluid or reagent 1064, can pass through the breaching element 1014 hollow portion 1067 and central opening or orifice 1062, as well as around the breaching element 1014 outer wall and the one or more peripheral openings or orifices 1066, toward the target chamber 1016 or matrix 1019. Similar to embodiments described above with respect to
The peripheral openings 1066, in addition to allowing fluid through toward the target chamber 1016, also allow air to be communicated between the housing 1012 and target chamber 1016, for example into and/or out of the housing 1012, mitigating or preventing vacuum formation in the housing 1012 and facilitating better fluid transfer toward the target chamber 1016.
In another embodiment illustrated in
In one embodiment, the breaching element 1114 includes a solid or blade portion 1170 toward the sharp end, the solid portion 1170 being adjacent the hollow portion 1167. The solid portion 1170 in the illustrated embodiment of
The first end 1160 of the housing 1112 can in some embodiments include one or more peripheral openings or orifices 1166 adjacent or contiguous the breaching element 1114 outer wall, or spaced therefrom. The peripheral openings 1166, in addition to allowing fluid through toward the target chamber 1116, also allow air to be communicated between the housing 1112 and target chamber 1116, for example into and/or out of the housing 1112, mitigating or preventing vacuum formation in the housing 1112 and facilitating better fluid transfer toward the target chamber 1116.
In such an embodiment, when the breaching element 1114 pierces or breaches the reagent storage element 1104, released fluid or reagent 1164, can enter through the side opening or orifice 1168 and pass through the breaching element 1114 hollow portion 1167 and central opening or orifice 1162, as well as around the breaching element 1114 outer wall and second opening or orifice 1166, toward the target chamber 1116 or matrix 1119.
Similar to embodiments described above with respect to
Though certain embodiments and combinations have been described, other embodiments and combinations are contemplated to fall within the scope of the present disclosure. For example, some embodiments can be used with microtitre plate (spelled microtitre in the United States) or microplate or microwell plate, which is a flat plate with multiple depressions, containers, or wells used as small test tubes. Microplates typically have 6, 24, 96, 384 or even 1536 sample wells arranged in a matrix, such as a 2:3 rectangular matrix. Some microplates have even been manufactured with 3456 or even 9600 wells.
As discussed earlier the term “matrix” used in this context is different from “matrix” used with respect to the component in the target chambers described herein. Those of ordinary skill in the art appreciate the distinction.
Many of the same kits used for RNA, DNA, and Protein extraction are adapted onto these microtitre formats. Since each well can perform a single extraction, depending on the layout of the plate 48, 96, 384, etc., reactions can be performed simultaneously. For example, each plate can have a membrane at the bottom of the well, which can specifically bind to a certain target molecule. Silica gel and its derivatives can be used for such membranes. Similar to single reaction columns, well plate processing requires a set of sequential delivery of reagents to and from the plates.
An embodiment for example can serve to automate the processing of these plates similar to embodiments described, which handle single columns. For example, each well can be in fluid communication with a reagent delivery column as described with respect to embodiments herein. In some embodiments, a set of wells (e.g., 2, 3, 4, 6, 8, etc.) can be in fluid communication with one or more reagent delivery columns. In yet other embodiments, one reagent column can be configured to process an entire plate, provided sufficient distribution manifolds are incorporated. Alternatively, a number of reagent delivery columns, such as 24 of them, can serve a larger number of wells, for example, 96 wells.
In various embodiments, the reagent storage elements 1204 can be sequentially forced or biased toward the breaching element 1214, the breaching element 1214 piercing the reagent storage elements 1204 in a manner similar to embodiments described above and other embodiments falling within the scope of the present disclosure. For purposes of brevity and clarity, those specifics already described are omitted here without any intention to limit the scope of the present disclosure.
In one embodiment, the system 1200 includes at least one, or in the illustrated embodiment, a plurality of distribution manifolds 1217 and at least two, or in the illustrated embodiment, a plurality of wells 1219. In one embodiment, the distribution manifolds 1217, each include a first region in fluid communication with the breaching element 1214 and/or the housing 1212, and a second region in fluid communication with at least one, or in the illustrated embodiment, two wells 1219.
For example, in the illustrated embodiment of
The system 1200 can be operated in any suitable manner including, without limitation, by being placed in a centrifugal device or any other biasing methods and devices described herein.
In various embodiments, the reagent storage elements 1304 can be sequentially forced or biased toward the breaching element 1314, the breaching element 1314 piercing the reagent storage elements 1304 in a manner similar to embodiments described above and other embodiments falling within the scope of the present disclosure. For purposes of brevity and clarity, those specifics already described are omitted here without any intention to limit the scope of the present disclosure.
In one embodiment, the system 1300 includes at least one, or in the illustrated embodiment, a plurality of distribution manifolds 1317 and at least two, or in the illustrated embodiment, a plurality of wells 1319. In one embodiment, the distribution manifolds 1317, each include a first region in fluid communication with the breaching element 1314 and/or the housing 1312, and a second region in fluid communication with at least one, or in the illustrated embodiment, two wells 1319.
In one embodiment, the system 1300 includes a first block or plate 1321 housing or securing the plurality of reagent delivery columns 1301, and a second block or plate 1323 housing, forming, or otherwise containing or including the plurality of wells 1319. The first and second plates 1321 and 1323 can be coupled or positioned adjacent one another such that each reagent delivery column 1301 is in fluid communication with two wells 1319 via corresponding distribution manifolds 1317. The wells 1319 can selectively include specific types of membranes, such as for example, RNA, DNA, Protein extraction matrix, or any other membrane depending on the desired application.
The system 1300 can be operated in any suitable manner including, without limitation, by being placed in a centrifugal device or any other biasing methods and devices described herein. In some embodiments, the first plate 1321 or the second plate 1323, or both, can house, form, or otherwise contain or include the distribution manifolds 1317, or portions thereof.
One of ordinary skill will appreciate other modifications can be made to embodiments described to arrive at other embodiments without departing from the scope of the present disclosure. For example, various components can be modified or replaced to accommodate specific applications. For example, if an application, experiment, or reaction it is desired that two or more reagents be mixed as they get released prior to being delivered outside a reagent delivery device housing, the reagent storage elements can be configured to allow such mixing. Such an embodiment can be advantageous to separate enzyme from solution that it is dissolved in, then mix them up when being processed.
Accordingly, the first and second reagents 1464, 1465 can at least partially mix in the housing 1403 prior to be delivered outside the housing 1403.
In one embodiment, as illustrated, when the reagent storage element assembly 1504 is actuated toward and contacts the breaching element 1514, the breaching element 1514 breaches or pierces the first and second reagent storage elements 1572, 1574, releasing first and second reagents 1564, 1565 therefrom, respectively, at about, or substantially, the same time.
Accordingly, the first and second reagents 1564, 1565 can at least partially mix in the housing 1503 prior to be delivered outside the housing 1503.
In yet another embodiment, as illustrated in
In various embodiments, the reagent storage elements sheets 1603 can be sequentially forced or biased toward a plurality of breaching elements 1614, the breaching elements 1614 piercing the reagent storage elements 1604 in a manner similar to embodiments described above and other embodiments falling within the scope of the present disclosure. For purposes of brevity and clarity, those specifics already described are omitted here without any intention to limit the scope of the present disclosure.
According to one embodiment, the system 1600 includes a plate structure 1616 including a plurality of wells 1619. In one embodiment, the plate structure 1616 can include a microtiter plate (spelled microtiter in the United States) or microplate or microwell plate, such as a flat plate with multiple depressions, containers, or wells used as small test tubes. Microplates typically have 6, 24, 96, 384 or even 1536 sample wells arranged in a matrix, such as a 2:3 rectangular matrix. Some microplates have even been manufactured with 3456 or even 9600 wells. For clarity of description and without any intention to limit the scope of the present disclosure, the plate structure 1616 will be referred to as microplate 1616.
In one aspect, the microplate 1616 can include or contain a target, matrix, membrane or core 1609 in each well 1619. The target 1609 can include any destination, location, medium, chemical, compound, structure, and/or other target to or toward which it is desired to deliver reagent stored in the reagent storage elements 1604. In one aspect, each well 1619 can be aligned with or correspond to respective breach elements 1614 and reagent storage elements 1604 in the reagent storage element sheets 1603.
In an example application, the housing 1612 of the column 1601 can be fixedly or removably coupled or positioned adjacent or contiguous to, or with respect to, the microplate 1616. In an aspect, the column housing 1612 can include a rectangular, square, circular, elliptical, and/or any other suitable shape or periphery. In an aspect, the reagent storage element sheets 1603 can be loaded in the housing 1612, and the system 1600 can be inserted in a centrifugal device (not shown in
In an embodiment as in that in
The wells can selectively include specific types of membranes, such as for example, RNA, DNA, Protein extraction matrix, or any other membrane depending on the desired application.
The system 1600 can be operated in any suitable manner including, without limitation, by being placed in a centrifugal device or any other biasing methods and devices described herein.
In one embodiment, as illustrated in
Other reagent storage element assemblies are contemplated to be within the scope of the present disclosure. For example, first and second storage elements can be coupled side by side to one another, or a reagent storage element assembly can include more than two reagent storage elements containing various or the same reagents.
Other control mechanisms are contemplated to be within the scope of the present disclosure. For example in some embodiments a biasing element such as a spring or the like can be positioned between storage elements or spacers that are between storage elements, the spring to include a particular stiffness ratio that prevents the spring from compressing when an actuation force up to a threshold force is applied thereto, and allows compression when the actuation force exceeds the threshold force. For example, in an embodiment in which the actuation force is applied by a centrifugal device, the spring does not compress when the rotation speed is at 2000 rpm; however, at rotations speeds higher than 2000 rpm, the rate and movement of the compression, and therefore, movement of the subsequent reagent storage element can be moderated.
Various described and not described components of embodiments of the present disclosure can be provided as kits for particular applications. For example, prepared reagent and/or eluent storage elements can be combined with one or more needles and/or spin columns. In some embodiments, the needle can be integrally formed with a corresponding spin column. In other embodiments, the needle can be removably and selectively coupleable with a corresponding spin column. In some embodiments, various actuation sources can be combined. Various components described herein or not described but falling with the scope of the present disclosure can be supplied in a kit in a modular fashion, allowing the user to combine elements as best suits the particular application. Furthermore, reagent storage elements can contain any suitable contents; for example in some embodiments they may contain buffers for extraction of DNA, RNA, or nucleic acid suspensions. In addition, embodiments of the present disclosure are not limited in application or reagent destination to those described, and can be used for any application where reagent delivery is desired.
The various embodiments described above can be combined to provide further embodiments. All of the U.S. patents, U.S. patent application publications, U.S. patent applications, foreign patents, foreign patent applications and non-patent publications referred to in this specification and/or listed in the Application Data Sheet are incorporated herein by reference, in their entirety. Aspects of the embodiments can be modified, if necessary to employ concepts of the various patents, applications and publications to provide yet further embodiments.
These and other changes can be made to the embodiments in light of the above-detailed description. In general, in the following claims, the terms used should not be construed to limit the claims to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled. Accordingly, the claims are not limited by the disclosure.
EXAMPLE RNA Extraction Using One EmbodimentReagent delivery apparatus for RNA extraction includes two parts: top and bottom. The top part includes a reagent delivery column. The bottom includes waste and spin column compartments. The bottom part can be provided with the spin column already integrated. Alternatively users can insert an off the shelf spin column such as Qiagen™ spin columns into a receptacle fabricated into the bottom part. The reagent delivery column can contain the following example reagents in respective reagent storage elements in an order starting from bottom.
-
- 500 μl of RNAse free air.
- 700 μl of wash 1 or RW1 in case of Qiagen™ RNeasy™ reagents.
- 500 μl of RNAse free air.
- 500 μl of wash 2 or RPE in case of Qiagen™ RNeasy™ reagents.
- 500 μl of RNAse free air.
- 500 μl of wash 2 or RPE in case of Qiagen™ RNeasy™ reagents.
- 1000 μl of RNAse free dry air.
A Sample can be prepared according a protocol such as disrupting the sample according to the appropriate protocol in order to release RNA into solution. For example, the solution can be RLT lysis buffer. Then one volume of 70% ethanol can be added to the lysis buffer and mix.
Up to 700 μ1 of solution (RLT+EtOH+sample) can be added the to the spin column compartment of the bottom part. The user can attach or couple the top (reagent delivery column) to the bottom part and place the assembled apparatus inside a centrifuge. The user then can close the lid and centrifuge at the recommended rate for a recommended duration such as 5 minutes or as specified by the manual instructions or other suitable protocol instructions. Following centrifuge operation, the spin column has been washed and contaminants are removed. Purified RNA can now be eluted from the spin column. To do so, the user may take the apparatus from the centrifuge, remove the top part (reagent delivery column) to expose the spin column inside the bottom part, take the spin column out of the bottom receptacle and place it inside a clean collection tube, add 30-50 μl of elution water, place it into a micro centrifuge, close the lid, and centrifuge at for example equal or greater than 8000 rcf for 15 seconds or other suitable duration. The eluent then will contain the RNA and is ready for downstream applications.
This is only one non-limiting example without any intention to limit the scope of the present disclosure, and reagent delivery apparatus according to various embodiments can be used for any suitable reagent delivery application.
Claims
1. A reagent delivery method using at least one reagent storage element configured to store reagent, the method comprising:
- movably positioning the at least one reagent storage element in a delivery column having a housing including a housing volume, positioning a seal portion of the reagent storage element to extend laterally beyond a width of a body portion thereof, the seal portion contacting the housing, and the body portion being spaced from the housing;
- coupling a breaching element to the housing toward one end of the housing volume;
- positioning the reagent delivery column in a centrifugal device;
- rotating the centrifugal device to produce centrifugal forces moving the at least one reagent element toward the breaching element;
- breaching the reagent storage element upon contact thereof with the breaching element to release reagent stored therein; and
- communicating reagent from at least one of the housing volume and the reagent storage element, to an external volume located externally with respect to the housing volume.
2. The method of claim 1 wherein the breaching of the reagent storage element occurs in the reagent delivery column housing.
3. A method of using a centrifugal device having a vertical axis, comprising:
- positioning a column having a longitudinal axis and a housing, in the centrifugal device, with the longitudinal axis at an acute angle with respect to the vertical axis of the centrifugal device;
- positioning at least one reagent storage element in the housing of the column;
- positioning a seal portion of the reagent storage element to extend laterally beyond a width of a body portion thereof, the seal portion contacting the housing, and the body portion being spaced from the housing;
- coupling a breaching element to the housing toward one end thereof; and
- rotating the centrifugal device at a speed to affect a biasing force on the reagent storage element, moving the reagent storage element toward the breaching element along the longitudinal axis of the column, the breaching element breaching the reagent storage element, releasing reagent stored therein and communicating the reagent to an external environment located externally with respect to the housing.
4. The method of claim 3, further comprising:
- positioning a counterweight adjacent the reagent storage element on a first side thereof opposing a second side thereof proximal to the breaching element, prior to rotation of the centrifugal device.
5. The method of claim 4, further comprising:
- positioning a resistance member having resilience qualities in the housing of the column toward an end thereof proximal to the second side of the reagent storage element prior to rotation of the centrifugal device; and
- balancing a mass of the counterweight and the resilience qualities of the resistance member, to achieve a desired speed of movement of the reagent storage element.
| 5058770 | October 22, 1991 | Herold |
| 6048735 | April 11, 2000 | Hessel |
| 20120316050 | December 13, 2012 | Daub |
Type: Grant
Filed: Feb 17, 2016
Date of Patent: Mar 26, 2019
Patent Publication Number: 20160160209
Inventor: Kianoosh Peyvan (Seattle, WA)
Primary Examiner: Matthew D Krcha
Application Number: 15/045,247
International Classification: C12N 15/10 (20060101); B01J 4/02 (20060101); B01L 3/00 (20060101); B01F 15/02 (20060101); C12Q 1/6806 (20180101);
